rtg_scanlines
The option documentation is properly formatted yet
Description: "Render scan lines in RTG graphics mode" Default: 0 Example: 1 Since: 1.1.3 Type: boolean
By default, when enabling [scanlines], they are not shown when the Amiga opens a RTG screen ("Picasso96"). You must also set rtg_scanlines = 1 if you want to render scanlines on these screens.
See also [scanlines].
Source: https://github.com/FrodeSolheim/fs-uae/blob/master/docs/options/rtg_scanlines